Update: The dealer says he's got the fridge working correctly on propane - the damper in the flue was misaligned and partially blocking the flue. After re-aligning, the fridge cooled correctly on propane.
A new E-Stone countertop has been ordered to replace the cracked one.
Water flow in shower now OK after removing "construction debris" from the plumbing.
No word on the Convertor noise or the other "minor" issues. Hope to get it in a few days for a further shakedown trip and try to hookup my Dual Coax Sat dish to the "Sat" and "Cable" inputs. If that works, I'll do the "Satellite Rewire" mod to distribute the sat output to the bedroom and outdoor TV's.
Thanks for all the suggestions.